Trump is clearly more dangerous than Ali Khamenei : Iran likes to verbally threaten Israel or the US but that's all they do, they never actually acts against them.
Trump is clearly more dangerous than Kim Jon-Un : they're bot authoritarain egomaniacs but at least Kim is controled by his generals, they know how to flirt with the limits but never cross them. Trump doesn't listen ot anyone but himself thinks he's some kind of genius who knows every issue better than anyone, even the poeple who've spent their lives studying that issue but he's a dumbass and an ignorant
But Putin is on an all different level than Trump : Putin is former KGDB, he's very intelligent, very well informed, he manipulative, he's slimy...
But I guess one could say Trump is more dangerous than Putin 'cause unlike Trump, Putin wouldn't have been dumb enough to let the kurds be massacred by the turks. In that sense, unlike Putin, Trump is danerous to his own allies...